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Question: Evaluating analytical partial derivatives

Question:Evaluating analytical partial derivatives

samantasubho 5 Maple 14
April 15 2012
0

I want to evaluate - del(psi)/del(x) analytically in MAPLE. I wrote the following lines for the purpose :

 

deltat := proc (x) options operator, arrow; lambda*x^m end proc

Gr := proc (x) options operator, arrow; g*beta*deltat*x^3/nu^2 end proc

xi := proc (x) options operator, arrow; g*beta*x/c[p] end proc

eta := proc (x) options operator, arrow; (1/4)*y*4^(3/4)*Gr^(1/4)/x end proc

psi := proc (x, y) options operator, arrow; nu*4^(3/4)*Gr^(1/4)*f(xi, eta) end proc

v := -(diff(psi(x, y), x))

 

The result should be summation of three terms. But MAPLE returns zero value. 

Any help is appreciated.

Regards
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